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Effect of brine injection on water dynamics in postmortem muscle: study of T2 and diffusion coefficients by MR
L Foucat1, S Benderbous, G Bielicki
1Structures Tissulaires et Interactions Moléculaires INRA, Theix, Ceyrat, France.
Abstract:
The dynamics of water in postmortem muscle were studied by magnetic resonance microscopy (MRM). Rabbit muscles were arterially injected with 3 and 5 M NaCl brine. T2 and diffusion mapping were performed during the onset of rigor mortis. A wide spread of T2 values and widely differing postmortem evolutions were observed for injected muscles, whereas T2 was spatially homogeneous for intact muscle. Also, highly variable spatial distribution of diffusion coefficients along (Dz) and across (Dx) the muscle fibers was observed and diffusion anisotropy Dz/Dx) was less marked in injected muscles. The results indicate heterogeneity of brine distribution far from the injection site soon after injection. The postmortem evolution of the parameters is discussed in terms of structural changes induced by brine injection. MRM provides insight into how water dynamics respond to different NaCl concentrations inside muscle.
Insights
Magnetic Resonance Microscopy (MRM) revealed how injected salt solutions alter water dynamics in postmortem rabbit muscle. Brine distribution became heterogeneous, impacting T2 values and diffusion during rigor mortis.
Area of Science:
- Biophysics
- Muscle Physiology
- Medical Imaging
Background:
- Understanding postmortem muscle water dynamics is crucial for food science and forensics.
- Salt solutions can significantly alter tissue properties after death.
Purpose of the Study:
- To investigate the effects of arterial injection of NaCl brine on water dynamics in postmortem rabbit muscle using Magnetic Resonance Microscopy (MRM).
- To analyze changes in T2 relaxation and diffusion coefficients during the onset of rigor mortis following brine injection.
Main Methods:
- Rabbit muscles were arterially injected with 3 M and 5 M NaCl brine.
- T2 and diffusion mapping were performed using MRM during postmortem changes.
- Spatial homogeneity and diffusion anisotropy (Dz/Dx) were assessed.
Main Results:
- Injected muscles showed a wide spread of T2 values and heterogeneous postmortem evolution, unlike intact muscle.
- Variable spatial distribution of diffusion coefficients (Dz, Dx) was observed in injected muscles.
- Diffusion anisotropy was less pronounced in muscles injected with brine.
Conclusions:
- MRM revealed rapid heterogeneity in brine distribution within muscle tissue, even far from the injection site.
- NaCl injection alters muscle water dynamics and structural properties during postmortem changes.
- MRM is effective in visualizing water dynamics in response to varying NaCl concentrations in muscle.
